new to the AR scene. Need an optic for it. I already have a red dot to try. What the gun will be used for is 50-400 yard target and varmint hunting. Coyotes, prarie dogs, etc. budget is $500 and down. I dont be any means needs a scope that cost as much as my rifle. This is not something my life is going to depend on. Just a fun shooter that does not need to break the bank.